Drinking tumbler with undulating base



FIG. 1 is a top, side and front perspective view of a first embodiment of a drinking tumbler with undulating base showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a top, side and front perspective view of a second embodiment of a drinking tumbler with undulating base showing the new design;

FIG. 9 is a front elevation view thereof;

FIG. 10 is a rear elevation view thereof;

FIG. 11 is a right side elevation view thereof;

FIG. 12 is a left side elevation view thereof;

FIG. 13 is a top plan view thereof; and,

FIG. 14 is a bottom plan view thereof. 

The ornamental design for a drinking tumbler with undulating base, as shown and described. 